Abstract:
A planarization process for a pre-damascene structure is described, wherein the pre-damascene structure includes a metal hard mask that is disposed on a first material layer with a damascene opening therein and a second material layer that fills the damascene opening and covers the metal hard mask. A first CMP step is conducted using a first slurry to remove the second material layer outside the damascene opening. A second CMP step is conducted using a second slurry to remove the metal hard mask.
Abstract:
A chemical mechanical polishing (CMP) process includes steps of providing a substrate, performing a first polishing step to the substrate with an acidic slurry, and performing a second polishing step to the substrate with a basic slurry after the first polishing step.
Abstract:
A method of removing contaminants from a silicon wafer after chemical-mechanical polishing (CMP). After a copper chemical-mechanical polishing and a subsequent barrier chemical-mechanical polishing operation, an aqueous solution of ozone in de-ionized water is applied to clean the silicon wafer so that contaminants on the wafer are removed. Alternatively, an ozone/de-ionized water buffer-polishing process is conducted after copper and barrier CMP and then the wafer is cleaned using a chemical solution or de-ionized water. Alternatively, an ozone/de-ionized water buffer-polishing process is conducted after both copper-CMP and barrier-CMP and then the wafer is cleaned using a chemical solution or de-ionized water.
Abstract:
A method for manufacturing a metal plug is described. A substrate with an opening is provided. Then, a barrier layer is formed on a surface of the opening. Thereafter, a metallic layer is formed over the substrate so that the opening is also filled. Next, a planarization process is performed to remove the metallic layer outside the opening. One main feature of the present invention is the performance of at least a high temperature treatment after the metallic layer is formed. Due to the high temperature treatment, internal stress between different layers is released.
Abstract:
A method of forming a plug is provided. First, a substrate comprising at least a dielectric layer is provided, and a patterned hard mask is formed on the dielectric layer to define a position of at least a plug hole. Subsequently, the dielectric layer is etched for forming the plug hole. A barrier layer and a conductive layer are formed on the substrate, and the plug hole is filled by the conductive layer. Thereafter, first, second, and third chemical mechanical polishing processes are performed in turn. Finally, a fourth chemical mechanical polishing process is performed to remove portions of the conductive layer.
Abstract:
A wafer carrier assembly for a chemical mechanical polishing apparatus and a polishing method using the same are provided. The present wafer carrier assembly comprises a first plate, a second plate and a flexible membrane. The first plate has a plurality of protrusions formed on a bottom surface thereof and the second plate has a plurality of apertures passing through. Each of the protrusions is matched with one of the apertures to enable the first plate and the second plate to detachably combine together. The flexible membrane is positioned under the second plate and contacts it. A surface of the flexible membrane opposite to the surface of the flexible membrane contacting the second plate provides a wafer-receiving surface.
Abstract:
A method of fabricating a high-density capacitor. At least one first trench is formed in a dielectric layer positioned on a semiconductor substrate. A first liner layer and a first conductive layer are formed on the semiconductor substrate followed by a first planarization process. At least one second trench having a joint side wall with the first trench is formed in the dielectric layer. A capacitor dielectric layer, a second liner layer, and a second conductive layer are formed on the semiconductor substrate followed by a second planarization process. The surfaces of the first conductive layer and the second conductive layer are then exposed to form a high-density capacitor having a three-dimensional structure.
Abstract:
A method for fabricating a vertical three-dimensional metal-insulator-metal capacitor (MIM capacitor) structure is disclosed. The present invention utilized a vertical three-dimensional MIM capacitor structure on the substrate to decrease the structure area of the MIM capacitor in logic integrated circuit and integration for copper dual damascene process at an identical capacitance on a chip; therefore, the capacitance density of the vertical three-dimensional capacitor can be increased. Furthermore, the present invention is provided a method for fabricating the vertical three-dimensional MIM capacitor structure that compatible with the fabrication of the copper dual damascene structure such that the number of the photomask during the fabrication process can be reduced.